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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>js函数作为一个值使用</title>
</head>

<body>
    <p>函数可作为一个值：</p>
    <p>x = myFunction(4,3) 或 x = 12</p>
    <p>两种情况下，x 的值都为 12。</p>
    <p id="demo"></p>
    <script>
        function myFunction(a, b) {
            return a * b;
        }
        var x = myFunction(4, 3);
        document.getElementById("demo").innerHTML = x;
    </script>
</body>

</html>